Quoting the readme:
> What is inside the zip file?
> The release bundle includes interpreter binaries [...]. malbolgelisp-v1.1.mb is the source code for the interpreter.
The way I parsed that when I first read it, I took it to mean that the filename of the lisp interpreter was "malbolgelisp-v1.1.mb" and was somewhere else in the repo, not in the 7zip archive with the interpreter binaries. I see what it means now, but the two ideas felt disjointed on my first reading.